is 2 4209503 - 1
has 1267187 decimal digits
takes 0.525 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2677.058865.6716%----7.058865.6716%0.0000%
PrimeNet2610.073062.2951%170003400000.00632.8357%0.079263.3643%1.0692%
GPU722651.733164.6154%220004500000.00821.8756%1.741365.2790%0.6637%
Difference+2+5.3256+1.0563%-22000-450000-0.0082-1.8756%+5.3174+0.3926%+0.3926%

Known prime factors (2 factors, 101.9 bits, 0.00242054% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4209503507245111511135.5626025
52 × 241
-252411.418e-96.649e-69.201e-6
4209503928117769268034861612066.33111024077774360
23 × 5 × 7 × 23 × 509 × 3363091
2018-12-1650933630915.01460.03320.0619

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
4209503470783201366776794455931868131131101.893
P-1 results:
No P-1 results for M4209503


Trial Factoring results:
No TF results for M4209503


ECM factoring results:

Old Calculation Method

Total ECM effort:0.182 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.182 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.182


Lucas-Lehmer results:
No L-L results for M4209503


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:34:17kkmrkkblmbrbkManual testing
50724511151
397E761E2BB833__no
2018-01-22T11:54:27alan145Bear1
50724511151
397E761E2BB833__no
2018-12-20T04:48:37Luigi MorelliGoogleCloudTmp
50724511151
92811776926803486161
CF69234CDCB6038Cno
2018-12-22T01:19:52Oliver KruseGTX-5
50724511151
92811776926803486161
CF69234CDCB6038Cno


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
106
107
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2018-12-22T01:19:52+00:00